using integer variable to image name in ios

Question

I have a set of images named 0.png, 1.png, 2.png, etc...

Say I only have five. I want to use an integer variable (infoInt) to determine what image is displayed. Since I'm naming the images in numbers, I though I could define the image as what ever the integer was. i.e. infoInt.png (as infoInt changes). I'm not sure how I can approach it. Here is my attempt.

- (void)viewDidLoad{

[super viewDidLoad];
UIImage *img;

for (infoInt =0; infoInt<=5; infoInt++) {
    img = [UIImage imageNamed:infoInt".png"]; //What to do here? How do I use infoInt variable in image name?
    [imageView setImage:img];
}

Lily Ballard · Accepted Answer · 2013-01-09 08:25:37Z

2

You can use +[NSString stringWithFormat:] to construct the name, as in

img = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png", infoInt]];

answered Jan 9, 2013 at 8:25

Lily Ballard

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2 Comments

Adrian Farfan Over a year ago

Hey thanks, the code definitely makes sense. But all the images seem to be displaying the one image, where infoInt = 5. I was hoping it was going to assign an integer for each increment. Is there a way I can increment the integer after assigning infoInt to an image.

Lily Ballard Over a year ago

@AdrianFarfan: You're assigning all the images, in turn, to the same imageview. Of course it's going to end up only displaying the last one.

P.J · Accepted Answer · 2013-01-09 08:26:44Z

0

Change this line

img = [UIImage imageNamed:infoInt".png"];

to

img = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png",infoInt]];

Hope it helps you

answered Jan 9, 2013 at 8:26

P.J

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Comments

ask4asif · Accepted Answer · 2013-01-09 08:27:10Z

0

You can use stringWithFormat and use the for loop counter to generate image name as

img = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png", infoInt]];

answered Jan 9, 2013 at 8:27

ask4asif

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Comments

Midhun MP · Accepted Answer · 2013-01-09 08:27:15Z

0

Use:

NSString *fileName = [NSString stringWithFormat:@"%d.png", infoInt]
img = [UIImage imageNamed:fileName];

Also refer NSString Class Reference for more string functions.

answered Jan 9, 2013 at 8:27

Midhun MP

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